Overflow incontinence occurs due to an inability to completely empty the bladder. There is a constant or frequent small amount of urine leakage. Essentially, the bladder becomes overfilled and the urine leaks out because the bladder can no longer maintain any more urine. Patients may experience symptoms of frequent night time urination, taking a long time to urinate, dribbling stream with little force, and/or urinating small amounts and not feeling completely empty afterward.